Há 17 anos, Karen Blixen desistiu da aventura na África e voltou para a Dinamarca para uma vida em ruínas. Destruída pela sífilis e arrasada por ter perdido sua fazenda e o amor de sua vida, ela se reinventa e se torna uma autora de sucesso. Agora, aos 63 anos, Karen Blixen é mundialmente famosa, mas também vive isolada, até conhecer o poeta Thorkild Bjørnvig, de 29 anos. Juntos, eles fazem um pacto: ela promete fazer dele um grande artista, em troca dele obedecê-la incondicionalmente.

American CIA Field Operative, Johnnie Allen, is assigned to Denmark for his first mission. An American spy highly placed in the Kremlin is to be spirited out of Russia, and it is Johnnie's job to get him safely to Antwerp where the agent will board a freighter. Johnnie, who is a young gay man, meets and falls in love with a Danish lad named Sander, who is apparently straight. Wanting to keep his friend close to him, he makes the mistake of bringing him on the mission. What will become of their friendship if Johnnie confesses his love to Sander? And is the Russian agent all he seems to be? Set against a backdrop of European espionage, Happy Endings Sleepover is a celebration of gay youth in a world where love should never be Top-Secret.